First of, the formula for Molarity = moles of solute / volume of solution measured in L. Therefore, the first thing to do is convert 45.5g of CaCl2 to moles.
45.5g CaCl2 x 1mol CaCl2/ 110.98 g CaCl2 (this number is found on the periodic table through molar mass) = 0.41 mol
Now, convert 500mL to L by dividing by 1000 = .5L
Lets plug it into the equation for Molarity = 0.41mol/.5L = 0.82M

Biology

TutorMe

Question:

How are variations created in the genes?

Shanon Q.

Answer:

Variations occur at the most molecular level of an organism: meiosis. Meiosis is the process of replication that makes a diploid (46 chromosomes in the human) to a haploid (23 chromosomes in the human). Variation occurs during Prophase I where crossing over occurs. This is when 2 homologous pair exchange genetic information. They attach at the synapse and exchange information to form a chiasmata. This is one of the simple and basic ways of exchanging information for variation. It is not the only way.

Basic Chemistry

TutorMe

Question:

What is the polarity of the structure of CCl4?

Shanon Q.

Answer:

First, what do we know about polarity? On the most basic terms, let me give you an analogy: imagine 2 children of equal weight sitting on a teeter totter, is the teeter totter balanced? (student answers: yes) The teeter totter is the bond between the 2 elements and the children are the elements. Lets say you have an adult and a child on the teeter totter, is it balanced? (student answers:no) So in simple terms, balanced meaning they are the SAME element is non polar and different element is polar. Thinking of that definition, is C-Cl bond polar or non polar? (student answers: polar). Good job! But what is the question asking for? if the STRUCTURE is polar. Structure is dependent on symmetry. So, if we were to draw out the Lewis structure for CCl4, it would like an equal cross, is that symmetric? (student answers: yes). So if the structure is non polar, it overrides the bond polarity making the entire struture polar.

Send a message explaining yourneeds and Shanon will reply soon.

Contact Shanon

Ready now? Request a lesson.

Start Session

FAQs

What is a lesson?

A lesson is virtual lesson space on our platform where you and a tutor can communicate.
You'll have the option to communicate using video/audio as well as text chat.
You can also upload documents, edit papers in real time and use our cutting-edge virtual whiteboard.

How do I begin a lesson?

If the tutor is currently online, you can click the "Start Session" button above.
If they are offline, you can always send them a message to schedule a lesson.

Who are TutorMe tutors?

Many of our tutors are current college students or recent graduates of top-tier universities
like MIT, Harvard and USC.
TutorMe has thousands of top-quality tutors available to work with you.